Thats kind of interesting, The beta installed was just under 10 GB's for me, but still that 12 GB's extra we are getting in retail, that alone gives me something to smile about.

I presume that big missing data are some other areas/regions maybe. Seing the worldmap, there are still 5 regions not in beta (Paghl'tan, O'Gomoro, Gravania, Xephatol and Gyn Abania). I don't think it's 10 GB of items/equip :D